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Old 04-03-2024, 05:17 PM   #1
BKWDco
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Identifying a hole in my floor

Hi All, I was hoping someone on here could help me identify this hole in the floor of my 59. More importantly, can someone help me identify a plug for said hole?
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Old 04-03-2024, 11:08 PM   #2
mr48chev
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Re: Identifying a hole in my floor

Original hydromatic truck?
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Old 04-04-2024, 01:08 AM   #3
BKWDco
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Re: Identifying a hole in my floor

I dont think so...Was the hydromatic just a GMC thing? The LMC catalog shows the same hole, but they also told me they dont sell a filler for it.
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Old 04-04-2024, 08:27 AM   #4
geezer#99
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Re: Identifying a hole in my floor

I think that’s the location of the stomp starter.
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Old 04-04-2024, 02:19 PM   #5
Hcb3200
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Re: Identifying a hole in my floor

I am going to go with Foot Starter Hole.
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Old 04-04-2024, 04:30 PM   #6
BKWDco
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Re: Identifying a hole in my floor

Thanks for the feedback, that seems like most best answer.
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Old 04-04-2024, 05:08 PM   #7
leegreen
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Re: Identifying a hole in my floor

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Old 04-05-2024, 01:41 AM   #8
mr48chev
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Re: Identifying a hole in my floor

Dang, that one got me last night. Yuppers, for sure the stomp pedal hole, this one covered with a piece of galvanized tin.
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My ongoing truck projects:
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Old 04-05-2024, 09:25 AM   #9
dsraven
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Re: Identifying a hole in my floor

you could fab your own formed metal patch pretty easily that fits into the hole with a raised perimeter edge thatcould be glued to the floor with urethane sealer, like windshield caulking. thats if you cant find a rubber grommet. otherwise, find a rubber grommet that if slightly larger and simply expand the hole to fit the grommet. or fab a ptach that fits the hole and weld it in.
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Old 04-05-2024, 09:27 AM   #10
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Re: Identifying a hole in my floor

go to a truck tire repair shop ang grab a couple of patches and glue one on from each side if youre not worried about the look.
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Old 04-05-2024, 09:30 AM   #11
Hcb3200
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Re: Identifying a hole in my floor

There have been many request for a "grommet" plug for that hole. With many threads with folks looking for one. over many years.
Don't believe they are to be found.
So I would just plan on making a patch/plug/weld/Glue to meet your need.
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Old 04-05-2024, 12:42 PM   #12
BKWDco
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Re: Identifying a hole in my floor

Its nice to hear I'm not the only one who has struggled to find out what it was AND want a plug for it. I found a patch option on amazon.... Im going to give it a try! Guess and Check and Repeat.
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Old 04-06-2024, 09:00 AM   #13
dsraven
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Re: Identifying a hole in my floor

I thoughtof those plugs, they are used in front floor areas and trunk areas in sedans, but thought they were usually too small for that hole. worth a try though. easy enough to fab up one for your needs too. they are usually glued in.
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Old 04-08-2024, 09:20 PM   #14
1project2many
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Re: Identifying a hole in my floor

The plug on Amazon looks like the right shape. There are also repros of OE plugs with tabs: https://www.chicagomusclecarparts.com/products/918731

Urethane is a great adhesive and it's good at filling gaps. Once you open the tube it begins to cure and it can only be stored for a short time before the entire tube is cured. I'd look for smaller tubes from one of the big box stores. Even better, they're available in different colors.
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Old 04-09-2024, 10:54 AM   #15
BKWDco
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Talking Re: Identifying a hole in my floor

The shape of the amazon plug was pretty good. I'll end up trimming it just a touch i think. Thanks for all the info and help. I entered the truck (as a long shot) in the small automotive section of our yearly MotoShow and they accepted it. So now im in a scurry to seal up a few of the long outstanding issues.
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